RESPONSES OF PAPAYA SEEDLINGS TO WATER STRESS

K. Bunya-atichart, S. Phuwajerernporn, N. Montri
The responses of papaya (Carica papaya) ‘Khaek Dam’ seedlings to water stress were investigated. Water stress was imposed by 1, 3, 5, 7 and 9 day of non-watering and subsequent re-watering during a period of 60 days after transplanting in glasshouse condition. The survival percentage, growth data; stem height, stem diameter, canopy width, leaf area, root length, leaf number and dry weight were measured. Growth analysis; dry weight percentage, relative growth rate (RGR), net assimilation rate (NAR), specific leaf area (SLA) and root/shoot ratio (R/S) were analyzed. The results found that the 9 days treatment had lowest survival percentage at 33.3%. The water stress at 3 to 9 day reduced stem height, stem diameter, canopy width, leaf area while it was not found in 1 day treatment. The root length, and stem dry weight percentages were not different when compared among treatments. RGR, NAR and R/S ratio did not change due to water stress. Growth of roots and leaves were enhanced in water stress as they had more root and leaf dry weight percentage.
Bunya-atichart, K., Phuwajerernporn, S. and Montri, N. (2014). RESPONSES OF PAPAYA SEEDLINGS TO WATER STRESS . Acta Hortic. 1022, 97-103
DOI: 10.17660/ActaHortic.2014.1022.12
https://doi.org/10.17660/ActaHortic.2014.1022.12
growth analysis, net assimilation rate, specific leaf area, root/shoot ratio
English

Acta Horticulturae